Tub-beater



J. E. SALSMAN.

,TUB BEATER.

AP ueAnoN FILED/Win29. 1918.

1,338,869. Patented May 4,1920.

2 SHEETS-SHEET 2.

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- UNITED STATES PATENT oFmoE.

JAMES SALSMAN, 0F CRESCENTVILLE, OHIO,ASSIGNOR OF ONE-TWELFTH TO ROWEAND FIVE-TWELFTHS TO HAROLD W. NICHOLS, BOTH OF CINCINNATI, OHIO,

AND ONE-EOURTH TO HARRY B. JONES, ARLINGTON, OHIO.

TUB-BEATER.

Beaters, of which the following is a full, clear, and exact description,reference being 7 hadto the accompanying drawings, form lug [part ofthis specification. v y invention relates to improvements in theconstruction of the ordinary tub beaterv which in paper mills isemployed forthe re- 7 duction of paper stock to pulp of the-desiredcondition for use in the subsequent paper 'making processes. Theordinary method consists in grinding and beating up the paper stock withwater in an oblong tub and continuing the process until the entire masshas been reducedto the proper consistency.

Efi'orts in the past have been made to provide devices with which,witholit nter- 'rupting the grinding of the stock, the finishedmaterialmay be drawn off while fresh paper stock is added to the beaterso that without stopping the machine the process may be continuous andthe finished stock may be removed continuously, but my 111- vention hasthe advantage .of working on much more varied grades of stock andwithout becoming continually clogged when on certain rough orcheap'grades of stock.

It is the'object of myv invention to. provide a novel separator whichwill be free from the objections heretofore encountered, to be appliedto the ordinary tub beater without change or modification thereof, bywhich the finished stock may be continuously withdrawn from the beaterwithout stopping the beater, and with which devices in' the preferableconstruction, the movement of the stock in the beater may be acceleratedand the finished stock prepared in less time than with the 'ordinarapparatus, and in which less power an close application of grindingsurfaces are reouire l in the drawings,

Figure 1 isa top plan view of the beater, with my improvements appliedthereto.

. s Fig. 2 is an end elevation.

' Fig.3 is a perspective view of the appa ratus for extracting thefinished stock.-

Specification of Letters Patent.

not so Fig. 4 is a-plan view of thesame, with the cylindrical casingremoved.

Fig. 5 is an end elevation, with the end wall removed.

The ordinary elon ated tub 1 is provided with the usual mideather 2 topermit circulation of the paper stock as it passes under the beatingroll 3, which is mounted on- .the shaft 4 suitably journaledacross the'middle of the machine and driven in any ordinary way, usually by belt 5and pulley 6. The beating roll 3 is provided with the usual knives 19which cooperate with the usual bedplate in the bottom of the machineforcutting and tearing up the paper stock, and the material is carriedover the usual back-fallv 7 and circulates slowly around the mid-featherin the direction of the arrow and back again to the beating roll. Thestock is usually introduced at oneend of the tub, where water fordigesting the material is also introduced. There is also indicated at 8an additional water pipe for supplying streams of water to the materialI Patented May 4, 1920. Application filed April 29, 1918. X Serial No.231,387.

just before it passes under the beating roll. I 7

All the foregoing are the ordinary and usual constructions of tubbeaters which have long beer; in usef In order to withdraw the finishedstock continuously, I provide acylindrical separator 9, which is mountedon the shaft 10,

one end of which is journaled on the midfeather, and the other journalis located on the side of the tub. This shaft with the cylindricalseparator is driven in any "ordinary way from the power pfa'na-asindicated by the belt 11 and pulley 12. The cylindrical separator is inits internal construction made up of circular heads oriends 13, 14, withlongitudinal partitions 15, 15,

dividing the cylindrical space into a number of compartments. As apreferable construction, I employ six of these radial partitions, makingsix compartments in the complete cylinder. The floor or bottom of thesecompartments slopes from one end of the cylinder near the periphery at16 downwardly toward the axis of the cylinder at 17 at the other end.The chambers of the cylinder are covered and inclosed by a smoothcylindrical casing 20 preferably of sheet metal or any other suitablematerial, while .the casing isto be smooth on the outslde.

The casing is provided with a series of per forations or openings 21,with the longitudinal rows arranged in staggered relation to eachother,-and where six compartments are provided there are six sets ofthese perforations with intermediate unperforated portions. Thecylindrical casing is so applied that the perforated portions will liefor the most part on the upper side and some distance above therespective partitions 15 so that the unperforated portion of thecylinder will form with the partitions 15 pockets to receive and holdthe material which enters through the openings as the separator isrotated in the stock, as will be hereinafter described. Each of thecompartments is provided with an opening at its lower or delivery endand the side wall of the tub forms 'a closure for these openings whenbelow the top edge of the tub, while the edge at the lowering the arm,the gate will be openedand shut, the gate being guided in the framework23. Outside'of the tub to receive the material discharged from theseparator through the gate any convenient arrangement may be providedfor carrying off the finished stock for subsequent treatment in thepaper making processes. I have illustrated a trough 25 for carrying offthe material. 7

Secured across the rear side of the cylinder running longitudinallytherewith and bearing against the cylinder, is a scraper 26 of anyconvenient form. I have illustrated a bar or doctor, but stiff wirebrushes may be employed, or other means for removlng from the cylinderas it is rotated any strings,

rope lor other materialthat may have a tendency to clog theperforations. As illustrated in the-drawings, the scraper bar is mountedone pair of rock arms 27, pivoted at the upper edge of the tub and themidfeather, and coiled springs 28 hearing on these arms outside thefulcrum point tend to hold the scraper with spring pressure against thecylinder, to permit it to give against any too great accumulation.

With the perforated cylinder mounted as described, it is slowly rotatedin the pre ferred method in the direction of the current of the materialcaused by the action of the rollbeater, at a speed slightly in excessofthe flow'that would be created by the beater alone, so that therotation of the roll has theefi'ect of accelerating the flow. Thesurface of the cylinder being smooth, the

finished stock by the movement of the cylin der is pushed through theperforations into the compartments of the cylinder, is carried up to thetop of the cylinder by the pockets formed between the partitions and theunperforated portion of the cylinder and flows down to the gate whenceit is deliveredinto the trough 25. It will be understood, however, thatthe cylinder may be rotated in the opposite direction. I

. Inasmuch as the cylinder is smooth and circular in cross section, anystrings or'material that would clog the perforations is removed anddrops back into the current to be carried again to the beater roll Thesmoothness of the surface assists in preventing the carrying over thecylinder or accumulation on. the cylinder of surplus material and tendsto regulate the amount and evenness of flow into the interior.

. Having thus described my invention, what I claim as new and desire tosecure by Letters Patent, is

1. In a tub beater, a separator for the finished stock comprising ahollow 'cylindrical roll mounted transverse the tub and adapted to berotated in the paper stock, said cylinder having a smooth exterior, withperforations for the cylinder of a size to allow the finished stock toenter the cylinder and reject the unfinished stock, and means fordischarging same therefrom.

2. In a tub beater, a separator for the finished stock comprising ahollow cylindrical roll mounted transverse the tub, partially submergedin the contents thereof, and adapted to be rotated in the paper stock,said cylinder having asmooth exterior, with perforations for thecylinder of a size to allow the finished stock to enter the cylinderduring the rotationthereof and reject I the unfinished stock, and meansfor discharging same therefrom.

3. In a tub beater, a separator for the finished stock comprising ahollow cylindrical roll mounted transverse the tub and adapted to berotated in the paper stock, said cylinder having a smooth exterior,withthe interior divided into a series of compartments, withperforations for the cylinder of a size to allow the finished stock toenter the cylinderduring the rotation thereof and reject the unfinishedstock, and means for dis charging same therefrom.

4. In a tub beater, a separator for the finished stock comprising ahollow cylindrical roll mounted transverse the tub and adapted to berotated in the paper stock, said cylinder having a smooth exterior, withthe interior divided into a series of compartments by longitudinalpartitions having floors inclined toward one end of the cylinder, withperforations for the cylinderof a size to allow the finished stock toenter the cylinder during the rotation thereof and 6.- In a tub beater,the combination with the beater, of a separator for the finished stockcomprising ahollow cylindrical roll mounted transverse the tub, artiallmerged in the contents thereof and a apted to be rotated in the paperistock, saidecylinder having a smooth exterior, with the interior dividedinto a series of compartments by longitudinal partitions and havingfloors inclined toward one end of the cylinder, with perforations forthe cylinder to allow the finished stock to enter the compartmentsalternating with blank portions to serve as pockets-with the partitionsto hold the stock and carry it to the upper portion of the cylinder,said perforations being adapted to-- reject the unfinished stock, andmeans for discharging the Same therefrom.

7. In a tub beater, the combination with the beater, of a separator forthe finished stock comprising a hollow cylindrical roll mountedtransverse the tub, artially submerged in the contents thereof? andadapted to be rotated in the paper stock, said cylinsubder having asmooth exterior, with the interior divided into a series of compartmentsby longitudinal partitions and having floors inclined toward one end ofthe cylinder, with perforations for the cylinder toallow the finishedstock to enter the compartments alternating with blank portions to serveas pockets with the partitions to hold the stock and carry it to theupper portion of the cylinder, means for discharging the same therefrom,and with means for preventing .the clogging of the perforations duringthe,

o eration.

8. In a tub beater, the combination with the beater, of a separator forthe finished stock comprising a hollow cylindrical roll mountedtransverse the tub, partially submerged in the contents thereof, withone head for the cylinder rotating therewith and the other headstationary, with the tub provided with a gate therein, and the cylinderadapted to be rotated in the paper stock, said cylinder having a smoothexterior with the interior divided into a series of compartments bylongitudinal partitions and havingfioors inclined toward one end of thecylinder, with perforations for the cylinder to allow the finished stockto enter the compartments alternating with blank portions to serve as1pockets with the partitions to hold the stoc and carry it to the upperportion of the cylinder, and with means for preventing the clogging ofthe perforations during the operation.

JAMES E. SALSMAN.

